MCQ
If A × B = {(1, a), (1, b), (1, c), (2, a), (2, b), (2, c)} then find set B:
- A{1}
- B{1, 2}
- C{1, a}
- ✓{a, b, c}
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$(A)$ $-\frac{1}{\mathrm{r}}$ $(B)$ $\frac{1}{\mathrm{r}}$ $(C)$ $\frac{2}{\mathrm{r}}$ $(D)$ $-\frac{2}{r}$